If you could make up your own Facebook application, what would it be like?

or does everyone hate facebook applications??If you could make up your own Facebook application, what would it be like?
The bacon application where you objective is to make the greatest bacon ever,invite people to play to get diferrent and better ways to make your bacon,this app will involve some action cuz having the best bacon and maintaining it is hard,when you are on top,all of a sudden some player can make a bacon even better,so good luck